There are three SIM card sizes

  • Standard
  • Micro
  • Nano
SIM TypeAlternative NameLength (mm)Width (mm)Height (mm)
Standard SIM2FF or “Mini SIM”25.0015.000.76
Micro SIM3FF15.0012.000.76
Nano SIM4FF12.308.800.67

Most phones sold in the last few years use micro or nano. Standard SIM are pretty obsolete these days, more than likely you will not use it.

Here is a graphic, if it looks like the below, you can match up the size.

sim-card-sizes

You can always cut a larger sim card to a smaller size. Or you can insert a smaller sim card into a larger compartment, use tape or another adhesive to make sure the metal is in contact.